Molding-machine.



PATENTED MAY 19, 1908. J. A. LEFFBRTS & T. W. SIMGOX.

MOLDING MACHINE APPLIOATION FILED MAR. 16. 1908.

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No. 888,242. PATENTED MAY 19, 1908. i J. A. LBFFERTS & T. w. SIMGOX.

MOLDING MACHINE. APPLICATION IIILED MAB.16.1908.

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\ avwantou E 1:; n .Lefferis W Ii:111:1: a 'z'mcox UNITED STATES PATENT OFFICE.

JOHN A. LEFFERTS AND THOMAS W. SIMGOX, OF ELIZABETH, NEW JERSEY.

MOLDIN G-MA CHINE To all whom it may concern:

Be it known that we, JOHN A. LEFFERTS and THOMAS W. Snuoox, citizens of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Molding-Machines, of which the following is a specification.

Our invention relates to certain new and useful improvements in molding machines, and the object of our invention is to produce a device of this character which will be simple in construction, cheap to manufacture, and one in which the molding operation can be carried on rapidly and at the same time produce molds wherein the sand is uniformly packed to the desired degree of density, so that accurate molds will be produced.

Vith these and other objects in view our invention consists in certain constructions, combinations and arrangement of parts the preferred form of which will be first described in connection with the accompanying drawings, and. then the invention particularly pointed out in the claims.

Referring to the drawings wherein we show the preferred form of our invention, and wherein the same part is designated by the same reference numeral wherever it occurs, Figure 1 is a perspective view; Fig. 2 is a cen tral longitudinal section and Fig. 3 is a section taken on the lines 3, 3 of Fig. 2.

1 designates the base of the machine of any desired construction and on which the parts are mounted.

2 designates a pair of uprights cut away at their lower portion, as at 3, to form recesses, into which extend the cylinders 4, the cylinders being attached to the base 1. In each of these cylinders is mounted a piston 5 from which extends piston rods 6, 6 connected to cross heads 7, 7, mounted in guide-ways 8, 8, cut in the inner sides of the upper portion of the frame. The cylinders 4 are provided with pipes 4 by which fluid pressure can be delivered to the cylinders on either side of the pistons, and these parts furnish the power for o erating the machines. These powersupp ying parts may be of any desired construc tion and form no part of our invention, the only thing necessary being that power should be exerted upon the cross-head 7 to move the same up and down in the vertical guides 8.

9, 9 are a pair of arms pivoted to the cross heads 7 by means of the pivots 10, and 11 is a plate connecting the arms together at their Specification of Letters Patent.

Application filed March 16, 1908.

Patented May 19, 1908.

Serial No. 421,437.

The plate 11 is provided at its ends with the projecting lugs 12, 12. These lugs are adapted to enter the guides 8. The standard is cut away at one side of the guides, as shown at 13, 13, in order to enable the plate 1 1 to be swung sidewise, for the purpose to be hereinafter set forth.

14 designates a plate provided with the upwardly projecting bolts 15, one bolt being secured adjacent to each corner of the plate. These bolts pass through the o enings 16 in the plate 11 and are provided etween their heads 17 and the surface of the plate 11 with the springs 18, whereby the plate 14 is normally held against the under side of the plate 11.

19, 19 are a pair of shafts mounted in bearings 20 extending upwardly from the upper surface of the plate 11, these shafts at one end being provided with sprocket wheels 21, connected together by means of the sprocket chain 22. One of the shafts 19 at its opposite end is provided with a turning wheel 23 having a handle 24 thereon.

25 are eccentric cams, a pair of said cams being mounted upon each of the shafts adj acent to the bearings 20, as best shown in Fig. 1. These eccentrics extend through slots 26 cut in the plate 11 and bear against the upper surface of the plate 14, whereby upon rotation of the shafts 19, by means of the handle 24, the plate 14 will be depressed.

Mounted u on the base 1, between the supports 2, 2, 18 the pattern supporting table 27, the pattern being supported upon its upper surface as shown in Fig. 2, the pattern being indicated by the numeral 28.

29 indicates a casing extending around the sides of the table 27, the lower edge of the casing resting upon the sto s 30 secured to the lower portion of the ta le 27 when the casing is in its lowest position. The height of the sides of this casing is such that when the casing is in its lowermost position, as shown in Fig. 2, and supported upon the stops 30, its upper edge will be flush with the upper surface of the pattern board of the table.

30 are set screws mounted in the stops 30 to insure the accurate registry between the upper edge of the casing 29 and the upper edge of the table.

31, 31 designate supporting arms which extend out from the ends of the casing 29 and with their ends in line with the ends of the arms 32 carried by the cross-heads 7. By

upper ends.

this construction, when the parts are in their upper position, as shown in Fig. 1, the casing 29 is supported by these arms. In the ends of the arms 31 I provide set screws 33, by means of which the distance which the casing 29 will extend above the pattern board when the casing is in its upward position can be adjusted in order to compensate for various sizes of patterns that may be used in the machine.

34 designates either the cope or drag portion of the flask and is of the ordinary construction and provided with the handles 35.

In the operation of our machine the power device which, in the present instance is shown as the cylinders 4, is operated so as to raise the cross heads 7 to their upper position. The plate 11 can then be swung sidewise to expose the top of the pattern table 28, it being remembered that when the cross heads are raised the upper edge of the telescoping section 29 extends above the pattern board, which is formed by the top of the table 27. The flank 34 is now placed upon the upper edge of the section 29 and filled up to its upper edge with sand. The amount of compression is controlled by the distance the telescoping section 29 can move down over the table before striking the stops 30, and

this amount of movement can be adjusted by means of the set screws 33. After the parts have been filled with sand the plate 11, carrying the plate 14, is swung over to the position shown in Fig. 1, and the eccentrics 25 operated to force the plate 14 down into contact with the upper edge of the flask. Power is now applied to the cross heads 7 to draw down the plate 11 until the lower edge of the telescoping section 29 comes into contact with the stops 30. When this occurs the lower surface of the flask is in the plane of the top of the pattern supporting table and all. the sand has been forced into the flask. The power on the cross-heads 7 is now reversed so as to raise the cross heads and consequently raise the flask from the pattern, and when the parts have been returned to the position shown in Fig: 1 the plate 11 can be moved aside and the flask lifted out. Another flask is then put in position refilled with sand and the operation repeated.

It will be noted that by our invention the maximum pressure is exerted on the sand around the pattern due to the telescoping section moving down on the table and gradually forcing all of the sand up into the flask. The weight of the sand and the movable parts also assist in the mold forming operation, and therefore the device will operate with a minimum of power, and at the same time produce molds which are properly compressed and which have sharp edges.

Vhile we have described what we believe to be the preferred form of our invention, we

changes can be made in the form, construction and arrangement of parts without departing from the spirit thereof.

Te claim 1. In a molding machine the combination with a pattern support, of a section surrounding the support and adapted to telescope thereover, said section being adapted to sup port a flask, means for supporting the section with its upper edge above the plane of the pattern support, said supporting means being unattached to the "flask supporting section, a plate adapted to cover the upper surface of the flask when the latter is in position, and means for applying vertical pressure to the plate to depress the flask until its lower edge is in the plane of the pattern support.

2. In a molding machine, the combination with a base, of a pattern support mounted thereon, a section surrounding the support and adapted to telescope thereover, said section being adapted to support a flask, guides extending upwardly from the base, a pair of cross heads mounted in the guides, powerapplying means connected to the cross-heads,

a plate adapted to cover the upper surface of the flask when the latter is in position, arms supporting the plate and pivotally connected to the cross heads and stops adapted to limit the downward movement of the telescoping section when its upper edge is in the plane of the pattern support.

In a molding machine, the combination with a base, of a pattern support mounted thereon, a section surrounding the support and adapted to telescope thereover, said section being adapted to support a flask on its upper edge, guides extending upwardly from the base, a pair of cross heads mounted in the guides, power-applying means connected to the cross heads, a plate adapted to cover the upper surface of the flask when the latter is in position, arms supporting the plate and pivotally connected to the cross heads, arms extending from the ends of the telescoping section, cooperating arms extending from the cross-heads, whereby the section will be raised upon the upward movement of the cross-heads and means for limiting the downward movement of the telescoping section when its upper edge is in the plane of the pattern support.

4. In a molding machine, the combination with a base, of a pattern support mounted thereon, a section surrounding the support and adapted to telescope thereover, said section being adapted to support a flask, guides extending upwardly from the base, a pair of cross-heads mounted in the guides for vertical movement, power applying means connected to the cross-heads, arms pivoted to the cross-heads, a pressure plate connected to the arms and provided with extending lugs I adapted when the plate is in its operating deslre to have it understood that many position to engage the guides.

5. In a molding machine the combination with a base, of a pattern support mounted thereon, a section surrounding the su port and adapted to telescope thereover, said section being adapted to support a flask, means for supporting the section with its upper edge above the plane of the pattern support, vertical guides mounted on the base, a pair of cross heads mounted in the guides for vertical movement, power-a plying means connected to the cross hea s, a late pivotally connected with the cross-heat s and adapted to be swung over the top of the flask when in position, a sup lemental plate carried by said rst mentionec plate anc means for moving 15 said supplemental plate away from the first mentioned plate and into contact with the top of the flask.

In testimony whereof we affix our signatures in presence of two witnesses.

JOHN A. LEFFERTS. THOMAS W. SIMCOX.

Witnesses:

J NO. M. CLARK, Jos. W. KIRBY. 

